hmmm... Good point. I wonder then, how I'm supposed to create an MX / A record in dyndns.org. They provide a form for it, and if I do dig @ns1.mydyndns.org -MX tacocat.net it comes up OK as janus.tacocat.net but you say it doesn't. I wonder what the problem is.
$ host -t mx tacocat.net This is a problem. You have no A *and* no MX records for your domain. RoadRunner's smtp servers are rejecting any mails whose return address has a domain that can't be contacted. If their server did accept the mail, and then had to bounce it for some reason (eg the recipient is over their quota), they would be stuck with an undeliverable bounce message. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]